The Buffalo Bills held their Blue & Red practice at Highmark Stadium on Friday night and fans showed up in a big way.

Here are three observations from the eighth day of Bills training camp: As usual, but it's still worth noting, it was a huge showing by Bills Mafia. Nearly 40,000, Bills fans made it out to Highmark Stadium and filled the lower bowl of the stadium.

The Bills will return to Highmark Stadium for the first time this year for the annual Return of the Blue & Red practice. It also means the return of Bills Kickoff Live.

More than 50,000 Bills fans packed Highmark Stadium for the Return of the Red and Blue practice, and one big reason made it bittersweet.

The Buffalo Bills held their annual "Return of Blue and Red" training camp practice at Highmark Stadium on Friday. It was Day 8 of camp but different than the others. Why? Well the attendance tells the story.

Following warm-ups and 7-on-7 drills, the Buffalo Bills deployed Mitchell Trubisky as QB1 on Friday evening at Highmark Stadium

The Bills have returned to Highmark Stadium for practice and Josh Allen ran onto the field wearing a throwback helmet as "Mr. Brightside" blared.

The Buffalo Bills' quarterback continued his annual summertime tradition, showcasing an alternate helmet during open practice at Highmark Stadium